“How to blueprint and tune” carb, exhaust and valve size ....kart,mini bike gx200,390 engine buikd

[@kylesyx8432]

Your so right ! It’s all about the differences we make in others lives is so important! To share a understanding you have with us , is the coolest thing going on in my life , so thank you ! The best compliment I’ve gotten in 53 yrs My son called me out of the blue… just to thank me for all I’ve taught him. How it’s gotten him not just a good job but a foreman at 26 at a Country Club. Sharing knowledge is most important! ✌️🤜💥🤛

[@paulskartslifan4206]

Wow man. Awesome ! Thank you

[@jutde]

The term “blueprinting” comes from the early days of NASCAR when cars had to be completely stock. Guys would get hold of the engine blueprints and go through piles of parts finding parts that were as close to “blueprint” dimensions as possible to remove as much error from tolerances as they could which resulted in engines that could produce more power.

[@guillermo3471]

Yes, I'd buy a copy of your recipe book! I love the engine math for these engines.

[@VanLifePays]

Thank you for taking the time to share this.. Shame on anyone who dislikes! Wish people would respect the time of the KZbinrs bringing value to their subscribers.

[@paulskartslifan4206]

That’s true .. a lot of research went into this video .. 👍

[@VanLifePays]

@@paulskartslifan4206 it shows brotha!

[@ryanbasile6805]

this video is better than any site, forum or advise ive found yet. good-looking out for the community you helped out alot with this vid ive came back to it every time i build up. keep it up

[@paulskartslifan4206]

Thanks for the inspiration, thank you

[@1MACVSOG1]

Thank you so much for the fast up load and the reply to my comments you truly are a God send that I found your channel and for you allowing me to pick your brain on occassions, I used to build go carts back in the early 80s while growing up, boy how things have changed in the small engine world.. now that I'm retired and have a lot of free time I'm getting back to what I truly loved doing as a kid. I really do want to thank you for taking time out to help a brother out! Again thanks a bunch!!!!!!

[@paulskartslifan4206]

Any time ! ...I live ,"for the build "...I got to much info in these notebooks not to share ..I have info on every build I ever did ..every test I ever ran ..every concept I proved right or wrong ...etc.......I've build gx390 style engines is my main job now ..not so much brigs or any other ..kinda focused in on them and have all the info you need ...let me know if there's something you might want to know ...I like getting video requests..I can't read minds so please ask away !

[@garyfraser8584]

Great vid paul! Lots of great info.

[@vtecpowersaw1577]

Wow..i knw what you u mean about information being hard to find ..fell in love with my mates honda car .now ive got 3 !!!im always lookin for new content and to be honest im only just ready to see this video coz a year ago i wouldnt of understood any of it but now in the last hour i feel like ive got 6 months of reserch and equations..so thanks mate from the land down under ..

[@evanarnett9558]

Awesome video. Totally learned a ton.

[@rc3291]

Take care and get well. I enjoy your videos but can wait a day or two.

[@paulskartslifan4206]

Yes... it's cold season once again here in Boston ...thanks for your well wishes ! I wanted to get the video out for the people who needed it ! Any guess on hp I got on the dyno ?

[@eWolution-motors]

Hey -first i have to thx for all the Input all of You Enginebuilders sharing on KZbin -your knowledge is worth so much ...over here in Germany it's hard to find even any Tuning parts for the GX Style engines -and if there is a Guy who got some knowledge He acts like this is rocket science. I just saw that Mikuni Flatside mounted in the Background -we got a TM34 on our 390 with a mild Torquecam with 38mm intake valve and i don't get it tuned right so it will run good in almost any Situation -it's either way too rich or at full open it's on the lean side 🥴 You got any Tips for a good "start up" jeting !? ...the Stock Setup was way too rich (about 250 mainjet) -I ended up with about 150 and some different pilots but at the end of the day i mounted the bored Stock Carb (125 Jet) back on and it runs fine. On a TM33 pumper we run about 130/135 main and 37,5 pilot i guess and it runs pretty perfect but this Setup wont fit for the TM34. Are you Guys using these carbs only on Methanol or on Racegas too 🤔 ...we only run on Racegas over here -but i'm thinking about E85. THX for any information.

[@paulskartslifan4206]

Thanks man

[@RW-kd4gxwhiteshaddow]

thanks for sharing. I wish you quick recovery

[@paulskartslifan4206]

I’m fine now .. that video was a while ago .. but I appreciate your concerns ..

[@RAWRMotorsports]

Your info is always on point ✌🤟

[@johndeesfpv9289]

awesome info , thanks

[@frankfitzpatrick5300]

Thank you Excellent information ! Is it ok to start with a 22m.m. Mikuni Carb Kit on my stock Ducar 196c.c Kart racing engine ? Is it overkill ? Is been set up for a stock engine . But , its tunable if i decide to build the engine . I know there is soo much you can do with a stock or 390GX carb. I just love Mikunis! Especially Flatslides. Thanks in advance Frank

[@paulskartslifan4206]

There is a lot of variables that depict carb size

[@trevinskiking2165]

Stock...a 22mm will be fine...it's better to be a bit under carbed than over carbed...my S90 Sports 90cc Honda 1970 roadbike runs a 20mm carb stock. Trev New Zealand 🤗🇳🇿

[@renesison3593]

Sir paul i was so inspired. How can i get a copy.

[@scmafia7515]

Intake port size, valves correct? I have 32 intake and 28 exhaust jrpw level 10 head, so a 28mm genuine mikuni would be to small then, correct?

[@MrHanky_YT]

52.8hp and it spun 9600 RPMs.... is my best guess. I never worked on or used a big block, so that’s best educated guess.

[@paulskartslifan4206]

Ok I won't say yet ..but good guess ..

[@MrHanky_YT]

I was wondering what happened to you you were posting regularly then you went silent. I can now see you’ve been building footage with lots to edit. But I like this info your putting out to the public. This is hard to find information. Now not every one will give a shit about all this. They would rather just slap a bolt on part and call it a double hp increase. But then there us who really gives a shit about the precision and know that it matters more than just bolting parts together to get the most performance possible.

[@paulskartslifan4206]

Your the winner ! ...not going to say what power it made since there is a competition coming up in a month that I'm entering .....you where the only one who guessed ....send me a text and I'll get you some stickers sent out ! Thank you for watching !

[@232Stangpwr]

What are those jumper wires going to your exhaust on the motor on your counter? Exhaust temp or wideband sensor?

[@NBrogdon45]

I know this is old but is hose that runs from the block to the cylinder head to a catch can on the bike. It's a evac system. Relieves block pressure basically.

[@michaeljensen6328]

Hello Paul when you say intake lenght, where do I meassure from? Start to finish? and the same with the exhaust? Love your videoes, gave me alot of information👍🏻 Best regards Michael(denmark)

[@paulskartslifan4206]

On the intake from the atmosphere to the valve seat and same on exhaust

[@michaeljensen6328]

Paul's karts Lifan 420 super thank you. Have you tried digital ignition on your engines.? I was planing on trying that, but not sure wich Will work!!??

[@paulskartslifan4206]

Are you talking pvl ? Or like a msd single cylinder ?

[@michaeljensen6328]

Paul's karts Lifan 420 Well I am not sure, what the difference is?! msd is that an Electronic ignition?!

[@akhiljoseph7769]

Thankyou for not being selfish..

[@jloganhicks1]

I dare you to spin one of those coffee containers on a crank bearing.

[@paulskartslifan4206]

Then it would be a frapacino ! 🤣🤣

[@jloganhicks1]

@@paulskartslifan4206 right on brother!

[@marshallmazzarelli8797]

Do you ever dyno the engines you build and if so how much hp yo putting out on a small block

[@paulskartslifan4206]

I dyno time to time like when I was putting the trinity combo together. But horse power will vary based off your combination. Bottom end size / head / cam/ carb combo etc. I have built a 304cc small block. I don’t give dyno numbers out since they vary greatly base on lots of factors. But mostly dyno things as testing I don’t dyno for customers if that’s what your asking. Thanks. Paul

[@paulskartslifan4206]

// I love some of these old ass videos .. I look so young ! Lol ...

[@darnellharrison6628]

Is it .08 or .80

[@therealdeal2094]

Can i replace 25mm valve to 24mm? Tnx

[@paulskartslifan4206]

Yes as long as it seats properly